N/record Module
Record.removeLine()
Method Description: Removes a sublist line. (dynamic and standard mode — see SuiteScript 2.0 – Standard and Dynamic Modes)
Returns: record.Record
Supported Script Types: Client and server-side scripts For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/record Module
Sibling Object Members: Record Object Members
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Record.removeLine(options)

// Code Example 1

// Add additional code.

// The following code snippet assumes that there are at least three committed lines present in the item sublist.

//...

objRecord.removeLine({

    sublistId: 'item',

    line: 3,

    ignoreRecalc: true

});

//...

// Add additional code.



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_4273165479.html